Motor using oil, gasoline, or gas as a fuel



May 8, 1923.

E. L. WRENTMORE MOTOR USING OIL, GASOLINE, OR GAS AS A FUEL 2 Shets-Sheet 1 Filed May 29, 1918 May 8, 1923.

E. L. WRENTMORE MOTOR USING OIL, GASOLINE, OR GAS AS A FUEL Filed May 29, 1918 2 Sheets-Sheet 2 Ill/671 MM W M Patented May 8, 1923.

UNHTED STATEfi I iasaaea earner easier.

ERNEST L. WRENTMOBE, OF WEST FARMINGTON, OHIO; (MRSJ MAUD V. WBENTMORE ADMINISTRATRIX OF SAID ERNEST L. WRENTMORE, DECEASED.

MOTOR USING OIL, GASOLINE, OR GAS AS A FUEL.

Application filed may 29, 1918. Serial No. 237,338.

To all whom-it may concern:

Be it known that I, ERNEST L. Wnmrr- MORE, a citizen of the United States, residing at Vv'est Farmington, in the county of Trumbull and State of Ohio, have made new and useful Improvements in Motors Using Oil, Gasoline, or Gas as a Fuel, of which the following is a specification.

This invention relates to valve mechanism for internal combustion engines, the

object being to render suchmechanism substantially silent in operation, and at the same time to so cushion all of the movements of the parts thereof that danger of breakage is substantially eliminated. The invention is shown in connection with, and certain features of the invention are particularly adapted for a certain internal combustion engine of the V type, such as is shown and described in my application Serial No. 285,197, filed March 26, 1919.

The invention consists in the construction and combination of parts shown in the drawing and hereinafter described and pointed out definitely in the appended claims.

In the drawing, Fig. 1 is a sectional end view of an engine to which the present invention is applied, the section being in the so plane of the broken line A-A on Fig. 2; Fig. 2 is a plan view of said engine with some of the valve mechanisms applied thereto, the others being omitted; and Fig. 3 is a side view of one of the ush rods.

The en ine shown is of t e V type, wherein the cy inders 1, 2, 3, 4, are arran ed in one inclined row, having their axes in the same inclined plane; and the other cylinders 1, 2, 3*, 4", are in another row with their axes in one plane which is inclined at a small angle, preferably an angle of 22%", to the first named plane. The c. linders of one row are likewise staggere with respect to the cylinders of the other row, that is to say, no cylinder in one row is in the same transverse vertical plane at right angles to the crank shaft as a cylinder of the other row. The upper ends of the cylinders of the two rows are so close together,'by reason of the small angle between the two rows, that a single head plate 10 maybe and is secured in place so as to cover the upper ends of all the cylinders. There is a depression ,7 in the top of the metal con-, necting the two rows of cylinders, which depression extends from one end to the other of the cylinder casting. There is likewise a corresponding recess 13 in the head plate so that when the head plate is secured upon The valves are poppet valves, each having a stem 5 which is slidably mounted in the engine head and projects above the same; and there are, of course, an inlet valve and exhaust valve for each cylinder. Associated with each valve is a valve rocker 18. All of these rockers are fulcrumed upon the same axis which is furnished by one or more nonrotating shafts 20, which are suplporttied in brackets 21 fixed to the top of the Gne arm of'each rocker engages, on one side of its fulcrum, with the stem of the associated valve, while, on the other side of its fulcrum, push rod 9 which is slidably mounted in a hole through the engine head, which communicates with the cam shaft tunnel. Eachpush rod engages with its associated cam and is provided with two forks 15 which lie on opposite sides of said cam and there by prevent the push rod from turning. A spring 22 interposed between each rocker and the engine head serves to actuate the rocker in that direction which will cause the associated valve to close. In what may be called the valve arm of each rocker is a hole 18 through which a threaded part of the associated valve stem asses. Below the rocker is a nut 31, fitte on the valve stem, which serves as an adjustable spring seat. Between this nut and the lower face of the rocker arm a spring 24 is interposed. Above the rocker arm a nut 31 is screwed onto the valve stem just above a washer 31 which loosely embraces the valve stem; and a coil spring 24 which surrounds the valve stem is compressed'between the washer and the top of the rocker arm. Because of the interposition of these springs it is evident that that movement of the rocker which opens the valve will be transmitted to the valve through the spring 24 which will exert a cushioning effect. it is also evident that that movement of the rocker which brings the valve to its seat is transmitted to the valve stem through the spring 24*. The presthe rocker is engaged by a maaaee ence of this spring not only has a cushioning effect, but it permits the rocker 18 to move farther than is absolutely necessary to cause the seating of the valve; and eliminates any danger to the valve if, by chance, the rocker should so move.

The other arm of the rocker has a hole 18 through it; and on its lower face around this hole is a concave seat-18. The push rod is provided below the rocker arm with a nut 28 which is screwed thereon, and has a convex upper surface for engaging the convex surface of the rocker. The ush rod extends through the said hole in the rocker arm; and a shoulder 27 is adj ustably secured to the projecting upper end of said push rod, and this serves as the seat for a spring 23 which is compressed between it and the upper surface of the rocker arm. Specifically this spring seat is the head of a screw which screws into an o enin 37 in the end of the push rod (see ig. 3. This spring serves alwa s to keep the nut 28 in engagement with t e rocker arm so that there never can be any clicking action due to the striking of the rocker arm by the nut, when the push rod is pushed up. If there is any wear on the cam or on the end of the rocker arm engaging with the cam this wear is automatically taken up by the action of the described parts; that is to say, the spring 22 will rock the rocker arm so as to cause the valve 5 to come to its seat, and then it will rock said rocker arm enough farther (compressing spring 24 as it does so) to cause the inner end of the push rod to engage the surface of the cam.

As shown, two rocker arms are arranged between each pair of brackets 21, and the opposed surfaces of the brackets and rocker arms are finished for engagement with one another. Between the rockers of a pair is a coiled sprin surrounding the supporting shaft 20, an this spring acts to thrust the two rocker arms apart and into engagement with the shoulderstfurnished by the brackets. This eliminates any possibility that the rockers may rattle and chatter against the brackets, and also serves to keep the rocker arms in proper position. It will be noted that because of the staggered arrangement of the cylinders, and because a single head plate covers them that the supporting shafts 20 for the various rocker arms may be in alignment.

Having described my invention, I claim 1. In valve mechanism, the combination of a poppet valve, -a spring actuated valve rocker aving in one arm a hole through which the valve stem passes, two spring seats on the valve stem located respectively above and below the rocker arm, springs respectively interposed between these two spring seats and the rocker arm, a cam, and a sliding push rod which engages said cam and the other arm of the roc er and having a resilient connection with at least one side of the rocker.

2. In valve mechanism, the combination of a poppet valve, a spring actuated valve rocker having in one arm a hole through which the valve stem passes, two spring seats on the valve stem located respectively above and below the rocker arm, s rings respectively interposed between t ies'e two spring seats and the rocker arm, a cam, a sliding push rod which passes loosely through the other arm of the rocker. a shoulder on said push rod engaging the lower face of the rocker arm, a spring seat on the push rod above the rocker arm, and a spring interposed between said spring seat and said rocker arm.

3. In valve mechanism, the combination of a poppet valve, a spring actuated valve rocker having in one arm a holethrough which the valve stem passes, two shoulders on-the valve stem located respectively above and below the rocker arm, a spring internosed between the rocker arm and the shoulder above the same, a cam, a sliding push rod which passes loosely'through the other arm of the rocker, a shoulder on said push rod engaging the lower face of the rocker arm, a shoulder on the push M above the rocker arm, and a spring interposed between the last named shoulder and the rocker arm.

4. In valve mechanism, the combination of a poppet valve, a spring actuated valve rocker having in one arm a hole through which the valve stem passes, two shoulders on the valve stem located respectively above and below the rocker arm, a spring interposed between the rocker arm and the shoulder above the same, a cam, a sliding push rod which passes loosely through the other arm of the rocker, a shoulder on said push rod engaging the lower face of the rocker arm, a shoulder on the push rod above the rocker arm, and a spring interposed between the last named shoulder and the rocker arm, said push rod having on its inner end a fork which straddles said cam and engages with opposite sides thereof.

In testimony whereof I have hereunto set my hand.

, DR. ERNEST L. WRENTMORE. Witnesses:

S, G F. D. mraara. 

